// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_STREAMS_STREAM_URL_REQUEST_JOB_H_
#define CONTENT_BROWSER_STREAMS_STREAM_URL_REQUEST_JOB_H_

#include "base/macros.h"
#include "content/browser/streams/stream_read_observer.h"
#include "content/common/content_export.h"
#include "net/http/http_status_code.h"
#include "net/url_request/url_range_request_job.h"

namespace content {

class Stream;

// A request job that handles reading stream URLs.
class CONTENT_EXPORT StreamURLRequestJob
    : public net::URLRangeRequestJob,
      public StreamReadObserver {
public:
    StreamURLRequestJob(net::URLRequest* request,
        net::NetworkDelegate* network_delegate,
        scoped_refptr<Stream> stream);

    // StreamObserver methods.
    void OnDataAvailable(Stream* stream) override;

    // net::URLRequestJob methods.
    void Start() override;
    void Kill() override;
    int ReadRawData(net::IOBuffer* buf, int buf_size) override;
    bool GetMimeType(std::string* mime_type) const override;
    void GetResponseInfo(net::HttpResponseInfo* info) override;
    int GetResponseCode() const override;
    int64_t GetTotalReceivedBytes() const override;

protected:
    ~StreamURLRequestJob() override;

private:
    void DidStart();
    void NotifyFailure(int);
    void HeadersCompleted(net::HttpStatusCode status_code);
    void ClearStream();

    scoped_refptr<content::Stream> stream_;
    bool headers_set_;
    scoped_refptr<net::IOBuffer> pending_buffer_;
    int pending_buffer_size_;
    std::unique_ptr<net::HttpResponseInfo> response_info_;

    // Total bytes received for this job.
    int total_bytes_read_;
    int max_range_;
    bool request_failed_;
    int error_code_; // Only set if request_failed_.

    base::WeakPtrFactory<StreamURLRequestJob> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(StreamURLRequestJob);
};

} // namespace content

#endif // CONTENT_BROWSER_STREAMS_STREAM_URL_REQUEST_JOB_H_
